In the saline soil, in order to avoid salt damage when transplanting, the live broadcast method can be used. The use of nursery and transplanting should pay special attention to the cultivation of strong roots. Practice has proved that breeding on the soil in the salt soil can improve the salt tolerance of the seedlings. After transplanting, the greening rate is fast and the survival rate is high. At the same time, it is easy to meet the needs of large-scale saline soil rice seedlings.
In order to cultivate and strengthen the cockroaches on the spot, the main problem is to prevent salt damage. In addition to the immersion of the shovel in the field, the measures should reduce the soil salt content as much as possible, and also coordinate the soil moisture, salt and The relationship between the three airs prevents the soil from returning to salt and prompts the seedlings to take root quickly.
Managing the Honda water is the key to coordinating the relationship between soil water, salt and gas, and promoting the early emergence of seedlings after the rice seedlings are moved into Honda. According to local experience, shallow water transplanting should be done. Immediately after transplanting, deep water (6 cm or more), seedlings for 2-3 days, and water change once a day can reduce the transpiration of rice seedlings and prevent salt damage, which is beneficial to The rice seedlings are rooted and turned green, and the effect is good.
After the rice seedlings return to green, they enter the tillering stage. If the salt washing is complete and the irrigation water quality is light (about 1 g/kg of sodium chloride), the shallow irrigation (l.5-3 cm) can be used to change the salt. Promote early tillering. Later, as the rice seedlings grow up, the number of water changes can be gradually reduced. Practice has proved that using the above irrigation method, under the condition that the irrigation water contains 2.3-3.0 g/kg of sodium chloride, the salt-killing seedlings can be significantly alleviated, basically meeting the requirements of seedling protection, and the yield is also significantly improved. At the end of the tillering period, the field can be properly placed, not only can control the late ineffective tiller, but also prevent the black root dead seedlings, and have a certain effect of increasing production.
The long-earing stage is mainly shallow irrigation or intermittent irrigation. In this period, the leaves cover the field and the evaporation is reduced. It can be intermittently irrigated or humidified. Generally, the irrigation is carried out once every 6-7 days. The water retention in the field is not less than 80%, and the topsoil is not cracked. It is advisable to fill the shallow water 1.5-3 cm 12-15 days before heading to prevent abortion caused by low temperature and increase the open rate.
Shallow water layer is the main stage from heading to filling stage, and intermittent irrigation is the main stage of milk ripening to yellow ripening, which increases soil permeability, enhances root activity and ensures the ripening of live stalk. The water stop time depends on the soil condition, and the water is generally stopped at the end of the waxing period.
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